Interfacial catalytic and mass transfer mechanisms of an electro-peroxone process for selective removal of multiple fluoroquinolones

被引：39

作者：

Yao, Jingjing ^{[1
,2
,3
]}

Yu, Bolun ^{[1
]}

Li, Haipu ^{[1
,2
]}

Yang, Ying ^{[1
,2
]}

机构：

[1] Cent South Univ, Ctr Environm & Water Resources, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

[2] Key Lab Hunan Prov Water Environm & Agr Prod Safe, Changsha 410083, Peoples R China

[3] Natl Univ Singapore, Dept Civil & Environm Engn, 1 Engn Dr 2, Singapore 117576, Singapore

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 298卷

关键词：

Density functional theory (DFT); Computational fluid dynamics (CFD); Electro-peroxone; Selective removal; Fluoroquinolones; METAL-ORGANIC FRAMEWORKS; OPERATIONAL PARAMETERS; HETEROGENEOUS CATALYST; EFFECTIVE DEGRADATION; WATER; OXIDATION; CARBON; OZONATION; KINETICS; OZONE;

D O I：

10.1016/j.apcatb.2021.120608

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ferrite-modified carbonized metal-organic frameworks were prepared and employed as a gas diffusion cathode to assist the circulating electro-peroxone (EP) treatment of three mixed fluoroquinolones (FQs). The initiated reaction rates of possible reactive sites exemplified the priority of the selective removal of FQs by O-3. The contributions of O-3 to the oxidation of the parent FQs were over 99%, while HO center dot was responsible for the oxidation of ozone-resistant transformation products and the total organic carbon removal. The adsorption and activation of H2O2 and O-3 into HO' were facilitated by abundant surface functional groups of the cathode, proper redox pairs (Fe2+/Fe3+ and Co2+/Co3+), high adsorption energy (-2.82 eV), and strong chemical bindings. The findings provided references to guide the improvement of electrocatalytic water treatment beyond limitations of conventional electrocatalysts by investigating experimentally and computationally HO center dot formation, mass transfer, and selective removal mechanisms.

引用

页数：13

共 69 条

[1] Porous NiCo2O4 nanostructures for high performance supercapacitors via a microemulsion technique [J].